Firearm



' May 21, 1929. J, DESTRE- 1,113,954-

FIREARM Fiied Nov. 23. 192e 2 sheets-sheet 1 f 112. Z "Willi/[l .ll// lllllnvlA Bal venian .1. DEsTREE May 21, 1929.

FIREARM Filed Nov. 2s, 192e z sheets-snm 2 .E11- razziali J l )atented llf'lay 2l, 1929.

F T he present invention relates to automatic fire arms and Vtothe obturating and percussion vmechanism -employed in conjunction 1 Y with this cartridge. Y

- rlhe cartridge case constructed according mit the engagement of an inwardly directed flange in an extensionof the cartridge case byfa. hooking. organ which is situated on :lathe obturaiting mechanism. The cartridge ,case is cylindrical and this form is necessary for*A permitting the casete recoil under pres- 'Y sure Vwithout,.distorting or tearing itself.

Gartridgesfhave been `known in which :hookedfextractors engage a ange in anextension of thebase but theyare conical and not 'cylindricalas isthe casein the present Vinvention. -2

' `The inventionhas also for its object an 1 20 obturation' device permitting the employ- 'ment'o this cartridge in an automatic fire v-arm. f u This device comprises an obturator provid# Led with an extension engaging with an eX- tension ofthe barrel, and vpresenting apart capable of engaging 'with the recess ofthe case. base herebefore speciiied vand a firing j jpinfprovided with a hooking lip capable of j engaging outside the said part. As this .,fhooking lip. 'may be constitutedy by a porvfgtion of a ring of arather great length, the 4ffsaiid part of the obturator engaging with therecessjofithecase base-may press on the whole surface of the cap. Theinvention has also provided for apercussionrdevice'comprising a hooking Amemb'er which can extract the case of the cartridgeiirednz a 4 t Y Y `The accompanying drawings show `by way of example several. yconstructions according tothe invention. In the said drawings, Figure Vl is a section through a cartridge Case. I i Figure 2isa similar section through a modified construction. f Figure 3 is a section through the end oi' an obturator.

Figure 4 shows inperspective view another obturator as well as the upper edge of ai cartridge magazine which can be utilized inthe same arm. Y Figure 5l is a longitudinal'section through the lrear portion of thev barrel of the said arm, the obturator being in the closing posi- Y" Y i 4 I t' v to my-invention has for its object to per-- vJOSEPH DESTRE, OF BRUSSELS, BELGIUM.

FIREARM.

Application filed `November 23, 1926, Serial No. 150,353, and in Belgium November 27, 1925.

Figure 6 is a similar section to that of Figure 3,through a modified construction.

Figure 7 shows in perspective an obturator vith a special construction of the extraction Figure 8 is a section of the cartridge to be .used in a fire armv provided with the obturator according to Figure 7.

' The base of the cartridge case, shown in Figures l and 2, is extendedfat 1 beyond the cap 2 to be tired, and has in its rear portion a recess l'enabling theiiring pin to reach the said cap. The said recess comprises towards the interior a iiange 4: enabling `the' case to be hooked or seized by an extractor introduced into the said recess'. In the case of Figure l, the extension 1 is suiliciently strong to withstand the whole orY part of the reactions which the case transmits tothe obturator duringl the firing. Y In the case of Figure 2, these reactions will vbe 5 transmitted directly by the bottom of therecess 3, and-,the extension will be exposed only to tensional stresses, and only. during the eX-4 traction of thecase. 1

Figure 3 shows an obturator 5 which could be used in co-operation with a cartridge case such as those just described, This obturator is provided with an extractor' '6 which is elast-ically. connected to it, owing to the fact that it is made as a flexible part, the lipvof whichis directed outwards, that is-to say, towards the periphery of the barrel.v During the closing ofthe arm, this extractor enga-geswith the recess?) of the cartridge case, and thelip engages behind 'theflange 4 in such 1a manner Vthat when the arm is opened, the case shall beextracted.

Figures 4C and relate to an arm inwhich theuse oiV acartridge caseA built in accordance with FigureV l and inthe manner just described, is particularly advantageous.

In the said arm, the obturator 5 comprises an extension 7 which, during the closing, en-

Vga, 3;es with an extension 8 of the barrel 9.

Owing to this arrangement, during the ,recoil of the obturator relatively tothe barrel, thechamber of the latter remains closed as long as the t-wo-extensions-are `not separated from each other. f

The extension 7 of the obturator' comprises a part 10 which can engage withV the recess 3 of a case such as that shown in Figure l. Theviring pin 11 which isvmounted inthe obturator, comprisesV a hooking lip 12 ca- Vin pable of projecting out of the partlO Vand of engaging. xvith'the flange of the case. Y The percussion 1s produced by meansof a hammei` 2O when the hooked notch 14 is dis-A engaged from the trigger not shown and builtin any desired Well known'inanner.' The percussion is produced by the point the tiring pin which strikes the cap containedin the V-base of the case. y Y Then the obturator begins to make afrec'oil movement relatively to the barrel 9, they iiring pin. provided with its extraction lip 12, Vwill be moved laterally (that .is to say,

upwards in the case of Figures 4 and 5). by the action of a spring 21 mounted in the obturator. f 1

Y .During thcfiring or percussion, the tiring pin somewhat compresses the lsaid spring 21 ox-ving to thevaction of the conical wall of the recess 3.

vlVhen the lip. 12 has been movedvlaterally,

Y it engages behind the flange 4, andy hooks the v oasegfthe latter will be ej ect-edV upwards whenH latter'. The. projecting portion. 16 of the.

shank'ofthefiringpin. is at this moment driven rearwards `by a flange 17 Which .is provided in ythe obturator 'and With4 which engages a Yreturnl spring 22 of the firing pin,

arranged between the said flange 17 vand the projecting portion 16. y

J'The iringpin 'and itshooking lipj12are thus driven rearwards bythe said Yobturator 5, and thus vbring 'about 4the extractionof--the itsrear face comes in-'contact With the'fejectors 18 secured to the magazineV 19 Ashown-in Figure 3. y j i A Inv the construction shown. 1n the drawings, the obturator isprovided atits lower portion 'at 23 with' a reduced portion capable of'engaging between the lips of theV maga-V zine 19. VVhentheobturator has'recoiledl suiiciently a cantridge-.is pushed past from' the magazine.y When theobturator closes up again the free end vof the part 10 of the prolongation 7 of the obturator; pushesth@ cartridge beforeit with a sliding action in orthodox fashion intotheback part andv interior of the'vvveapon. Y l

The-modified construction shown inrFigure 6, Ydiffers from the preceding construe! tion by its percussion device;

The percussionor lfir-ing is produc-ed .means of a'percussion spring 13 when the hooked notchf14 of therstriker or ringppin is disengaged from the trigger notl shown. As regards the lateral movement,git.is Vob- Y* tained by the co-operation of rampsjor. cams 24 and 15,V one of which 24,` forms part of the obturator, and` the other, 15, Aof 'the striker. Vhen the cartridge'` is rfired' the gas drives backjthe case and in consequence of/the obturator engaging -itat the Vgiven moment,`the case 'is stoppedby the ejector's 18but the obturator is caused torecoil uninterruiz) tedlyby its own inertia. In'jthese conditions the percussion spring 13 achievcap isfbrought into contact With thel obturator. By meanswofthe relative movement which is thus produced between the percusplanes 15 and 24 compel the ormer'to Ydis- 121is caused to'fcatchthelip'ror ange4;

of the cartridge. Y

As inthe caseof Figure, it is yno longerV Y necessary touse a returnsprmg ofthe `Iirmgf ing the ,release which 'hasV been1 checked by the contact of the percussion meanswith the ,sionbmeans land theobturator the' inclined "place itself laterallyfrand the hookin organ pin, the parts 16 and 17 could AcomeintodiY Y rectv contact. l v Y Figuref7-shows an obturator ofthe kindv shown infEigurei6,1. but its ,hooking li'l2 has the shape of a portion. of a ring vhoo ling Y Y the fiange .4 along a great length',.whilst"at thesame time enablingthe end face of the suv part 10 to press on theA Whole surface of thek cap' 2,'.l In this way, the latter cannot become deformed during, the explosion. Y

1 The elongated shape ofthe'lip `1l2makes it f also possible, for one andthe sameleffort ofV extraction of the-casato reduc'euthe dimen-y I the case. l

duce proportionately the n depth `of 'the recess 3 (FigurekB) which, resultsxina saving of material and in facilitating .UWhat I claim is:

-1 1. A percussion devicev lfor yfire arms 'comi-, pr1singqafir1ng pin,.;ian extractlonv 11p `sel cured to the'rmg pin, `meansfor laterally Y.

Y sion ofthe lip inthe direction ofthe axis of Y This"peculiaritykmakesitlfp'ossible'to. re- Y the machining. Y

displacing the firing-pin after .the percussion;

21 'A percussion device for `fire a-rms` comf prisingwa -firingpim an extraction li lise# i' y nW the iringpm after the per-v cured to" the i firing pin, a sp1-ing for Y' ater-y ally displacing cussion. j Y Y,

A percussiondevice-for.ie arms co1np1isinga-nfiri1ig pin, ianfextr'actionfV lip ser 1 2 cured to the v.firing pin, Y'rampsufor laterally displacingy the firing .after the VpercusfVA 's jecting `outside the said part. i

i5. An obturation device forfire arms com-V f prisingH an obturator with an extensionrengag1ng.\v1th` a-n extens1on of` the barrel, a.

part capablev of engagingwith the recessY of a case base lof the? 'character'described arf` ranged on said.V extension .and capableV of pressing `on' the ,wholesurface of "the `cap, a firing' pin Vprovidedwith a .hookin lip ca.- pableof projectingoutside the sai part;

Y 6. An obturationdevice for automatic fire-A wey arms comprising an obturator with an extenf" sioniengagingvvith an extension of the bar- -rel, `a part capable of engaging with the 'p `recess of a case base of the character described arranged on said extension,V a firing Ypin` provided with a hooking lip capable of projecting outside the said part.

` 7. An obturation device for automatic fire arms comprising an obturator With an exten- 'Vlsion engaging With an extension of the bar- Yreha part capable of engaging With the 7 recess of a case base of the character described arrangedon said extension and cafpabl'e of pressing on the Whole surface of :the cap, a ringzpin provided with a hooking e1 lip capable of projecting outside the said rpart.

lip secured to the firing pin, ramps for laterally displacing the firing pin after the percussion. In testimony whereof I a-iix my signature.

JOSEPH DESTRE. 

